Trump's inaugural committee is offering elaborate presidential perks - including candlelight dinner with the President-elect, cabinet nominees and congressional leaders - for supporters ready to make seven-figure contributions for the billionaire tycoon's swearing-in on January 20.

"Greece has gone through very challenging and dramatic times over the last several years," Obama, the first U.S. president to visit Greece since Bill Clinton in 1999, said during a meeting with Greek President Prokopis Pavlopoulos.

Chinese greeted Donald Trump`s victory with a mix of optimism and bemusement Wednesday, unsure how the US president-elect who demonised their country on the campaign trail would approach it once in office.

Republican Donald Trump campaigned on a promise to shake up Washington and as president the brash real estate mogul will be in a position to dramatically change how the United States handles immigration, trade and a range of other policies.